<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            display: flex;
            width: 800px;
            height: 300px;
            background-color: pink;
            /* 换行 */
            flex-wrap: wrap;
            /* 因为有了换行，此时我们恻轴上控制子元素的对齐方式我们用 align-content */
            /* align-content: flex-start; */
            /* align-content: center; */
            /* align-content: space-between; */
            align-content: space-around;
        }
        
        div span {
            width: 150px;
            height: 100px;
            background-color: purple;
            margin: 10px;
        }
    </style>
</head>

<body>
    <div>
        <span>1</span><span>2</span><span>3</span><span>4</span><span>5</span><span>6</span>
    </div>
</body>

</html>